WO2005001539A1 - Camera lens-positioning device using shape memory alloy and camera using the device - Google Patents

Camera lens-positioning device using shape memory alloy and camera using the device Download PDF

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Publication number
WO2005001539A1
WO2005001539A1 PCT/JP2003/008220 JP0308220W WO2005001539A1 WO 2005001539 A1 WO2005001539 A1 WO 2005001539A1 JP 0308220 W JP0308220 W JP 0308220W WO 2005001539 A1 WO2005001539 A1 WO 2005001539A1
Authority
WO
WIPO (PCT)
Prior art keywords
support member
lens
lens support
camera
shape memory
Prior art date
Application number
PCT/JP2003/008220
Other languages
French (fr)
Japanese (ja)
Inventor
Makoto Ito
Masaaki Inaba
Original Assignee
Nokia Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Corporation filed Critical Nokia Corporation
Priority to PCT/JP2003/008220 priority Critical patent/WO2005001539A1/en
Priority to AU2003244145A priority patent/AU2003244145A1/en
Priority to JP2005511132A priority patent/JPWO2005001540A1/en
Priority to KR1020057025125A priority patent/KR100821697B1/en
Priority to EP04746937A priority patent/EP1640757A4/en
Priority to PCT/JP2004/009468 priority patent/WO2005001540A1/en
Priority to CNB2004800181425A priority patent/CN100359355C/en
Publication of WO2005001539A1 publication Critical patent/WO2005001539A1/en
Priority to US11/316,251 priority patent/US7177539B2/en
Priority to JP2009183042A priority patent/JP2009258760A/en

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G02B7/102Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/023Mountings, adjusting means, or light-tight connections, for optical elements for lenses permitting adjustment
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/08Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/18Focusing aids
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32Means for focusing
    • G03B13/34Power focusing
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053Driving means for the movement of one or more optical element
    • G03B2205/0076Driving means for the movement of one or more optical element using shape memory alloys

Definitions

  • the present invention relates to a camera lens positioning device for executing a variable focus mechanism of a camera such as an autofocus mechanism, an auto macro mechanism, an electric macro mechanism, a zoom mechanism, and more specifically, a camera lens using a shape memory alloy.
  • the present invention relates to a positioning device and a camera using the positioning device.
  • the factors that determine the depth of field include the resolution and the maximum permissible circle of confusion.
  • the maximum permissible distant view decreases, resulting in a narrower depth of field. Therefore, especially when the resolution is increased, it is necessary to determine the center of the depth of field to an appropriate position.
  • the center of this depth of field can be determined by the position of the camera lens, as well as the focus position. Therefore, for example, in order to more closely photograph an object to be photographed or an object to be photographed farther away, it is necessary to position the camera lens as accurately as possible.
  • DCM and STM are used, it is difficult to reduce the size of the device, and they are not suitable for a small device such as a mobile phone.
  • DCM requires gears and sensors to move the lens
  • STM requires driving devices, electrical circuits and sensors such as lead screws and gears to move the lens. Therefore, it has disadvantages such as high power consumption due to mechanical drive, complicated structure, many failures, and high cost.
  • Japanese Patent Application Laid-Open No. 2000-137715 discloses that two plate-shaped shape memory alloys are deformed in response to a change in temperature so that a space between these plate-shaped shape memory alloys is formed.
  • An apparatus for moving the position of a camera lens through contact between a part of the arranged camera lens and a shape memory alloy is disclosed.
  • this device is only a device for moving the position of the camera lens according to a temperature change, and does not relate to a technique for freely positioning the position of the camera lens.
  • Hei 6-230457 two thin line-shaped shape memory alloys are provided on each of the left and right sides of the diaphragm member of the force ram, and by utilizing the function of these shape memory alloys, An aperture adjusting device that moves an aperture member according to a temperature change is disclosed.
  • This device is a device that moves the diaphragm member according to the temperature change. It does not relate to a technique for positioning freely. Disclosure of the invention
  • the present invention provides a positioning device capable of moving a camera lens using a shape memory alloy to determine a position with required accuracy, and a camera using the positioning device with low cost, low power, a simple structure, and a small space. Is what you do.
  • a housing a lens support member that supports a camera lens, and is provided on the nozzle so as to be movable in a direction approaching or away from the imaging target, and a lens support member
  • a guide member provided along the movement direction for guiding the lens support member in the movement direction; and the lens in a direction of approaching the object to be photographed or away from the object to be photographed.
  • a camera lens positioning device that regulates a movement range of the lens support member in the movement direction is provided.
  • the shape memory alloy may be such that it shrinks when an electric current is applied.
  • the member that constantly applies the force may be a coil panel.
  • a projection or a hole is provided in the lens support member, and a hole or a projection is provided in the nosing corresponding thereto, and the projection is inserted into the hole, and the moving direction is changed.
  • the movement range of the lens support member may be restricted by causing the wall of the hole disposed opposite to the projection to collide with the projection.
  • FIG. 1 is a schematic perspective view of the inside of a camera module according to the present invention as viewed from the inside.
  • FIG. 2 is a partial perspective view of a housing of the camera module of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a schematic perspective view of the inside of the camera module as viewed from the inside
  • FIG. 2 is a view of a portion # 1 of the housing of the camera module. Note that the camera module 1 shown in these figures only constitutes a part of the camera and is not used alone. Moreover, since the state when this camera module ⁇ ⁇ ⁇ is inserted into the camera is clear, it is not particularly shown.
  • the camera module 1 mainly includes a housing 11, a movable lens barrel 13 movably attached to the housing 11, a guide shaft 15 for regulating a moving direction of the lens barrel 13, A coil spring 17 that applies a normal force to the lens barrel 13 in one predetermined direction, a shape memory alloy 16 that drives the lens barrel 13 by appropriately applying a force in a direction opposite to the one predetermined direction, and photographing It consists of a photo sensor 18 for confirming the position of the object.
  • the lens barrel 13 is formed in a substantially cylindrical shape as a whole.
  • the camera lens 19 is fixedly provided near the center hole of the lens barrel 13.
  • the front part of the lens barrel 13 is inserted into a through hole 22 provided in the front plate 21 of the housing 11.
  • the front annular portion (not shown) of the camera lens 19 and the lens barrel 13 is exposed on the front surface of the housing 11 (the front side of the front plate 21 of the housing 11).
  • the lens barrel 13 can be moved in the direction of retracting into the housing 11 or protruding from the housing 11 while being inserted into the through hole 22.
  • the camera lens 19 moves in accordance with the movement of the lens barrel 13 due to the force fixed to the lens barrel 13. By this movement, the position of the camera lens 19 is adjusted, and the focus of the camera is adjusted and the zoom is performed.
  • substantially semicircular protrusions 24 A and 24 B protruding from the left and right sides, respectively.
  • a through hole 26 is provided near the center.
  • the guide shafts 15 pass through these through holes 26 respectively.
  • the lens barrel 13 can be guided along these guide shafts 15.
  • the lens barrel 13 extends vertically from the back of the front plate 21 of the housing 11 toward the inside of the housing 11 so that the lens barrel 13 can move vertically with respect to the front of the housing 11.
  • a guide shaft 15 may be provided on the machine.
  • a part of the left substantially semicircular projection 24A is shown in a broken state so that the relationship between the guide shaft 15 and the substantially semicircular projection 24 is clear.
  • a vertical protruding portion 29 having a rectangular cross section protruding upward is provided on an upper side surface near the middle of the lens barrel 13.
  • the upper part of the vertical protrusion 29 is inserted into a rectangular hole 28 provided in the upper plate 23 of the housing 11 when the power module is assembled.
  • the length of the vertical protrusion 29 in the direction of movement of the lens barrel 13 is such that the length of the hole 28 in the housing 11 in the above direction is such that the lens barrel 13 can move inside the hole 28. It is slightly smaller than the length.
  • a wall 3OA and a wall 30B are formed inside the hole 28 of the housing 11 along the moving direction of the lens barrel 13 so as to face each other.
  • the movement range of the lens barrel 13 partially inserted into the hole 28 of the housing 11 can be regulated.
  • the lens barrel 13 collides with these walls 30 A, 3 OB in the direction of its movement, so that its range of movement- Is limited.
  • the length (distance) in which the lens barrel 13 can move is apparently (the length between the wall 3 OA and the wall 3 OB) one (particularly the tip of the vertical protrusion 29 in the moving direction). (Thickness in the vicinity). This may be considered to be, for example, about 0.05 mm.
  • the walls 30A and 3OB can be integrally formed as a part of the housing 11 with a mold or the like.
  • the coil spring 17 is a member for applying a force in one predetermined direction on the lens barrel 13.
  • the coil spring 17 is provided so as to surround the guide shaft 15.
  • One end of the coil spring 17 collides with the front plate inner wall 27 of the housing 11, and the other end thereof has a substantially semicircular projection 2 4 of the lens barrel 13. Collides with the front of the 2 5.
  • the lens barrel 13 is constantly pressed in the direction away from the object to be photographed (in the direction of arrow a in the drawing), in other words, in the direction in which it collides with the wall 3OA.
  • the focus point of the camera at this time is about 1 m
  • the depth of field is about 70 cm to infinity.
  • the shape memory alloy 16 functions as an actuator that moves the lens barrel 13.
  • the shape memory alloy 16 may be formed in a thread shape, for example. Its diameter is about 1 mm force or less.
  • the shape memory alloy 16 is taken in from the outside of the housing 11 through a hole 32 provided in the front plate 21 of the housing 11, and the tip of the shape memory alloy 16 is a substantially semicircular projection 2 4 of the lens barrel 13. It is fixed to a rod 3 4 that extends vertically from the top of.
  • the shape memory alloy 16 is formed so as to shrink when a current is applied, and to gradually return to the original length when the application of the current is stopped. It should be noted that the current is applied to the shape memory alloy 16 only at the time of photographing, and therefore no wasteful power is consumed by this shape memory alloy.
  • Shape memory alloy 1 When the lens barrel 6 is retracted, the lens barrel 13 at the normal position is pushed by the force of the coil spring 17 through the contact between the shape memory alloy 16 and the rod 34 to approach the object to be photographed (arrow in the figure).
  • Direction in other words, a part of the vertical protrusion 29 of the lens barrel 13 is moved in a direction in which it collides with the wall 30B (a direction approaching the wall 30B).
  • the lens barrel 13 moves away from the object to be photographed (in the direction indicated by the arrow a) while being promoted by the action of the coil spring 17, in other words, However, a part of the vertical projection of the lens barrel 13 is moved in a direction in which the lens barrel 13 collides with the wall 3 OA (a direction approaching the wall 3 OA).
  • the focus point is about 40 cm, and the depth of field is about 25 cm to 1 m. It is.
  • the extent to which the shape memory alloy 16 shrinks when a current is applied can be adjusted to some extent by the amount of current. However, it is difficult to adjust the amount of current, and in this case, the manufacturing cost also increases. Also, even if the same amount of current is applied, the size of shrinkage varies for each shape memory alloy. On the other hand, even when the same shape memory alloy is used, the size of shrinkage varies depending on room temperature and humidity. As described above, the shape memory alloy has a force having an unfavorable property. In the present invention, since the movement range of the lens barrel 13 is regulated by the wall 30A and the wall 30B, an inexpensive shape memory alloy is used.
  • the positioning of the camera lens can be performed with the required accuracy, at a low cost, and with a simple structure.
  • the shape memory alloy to be used is one having a sufficient driving amount to cover the moving range of the lens barrel 13, preferably a lens It is preferable that the barrel 13 has a drive amount slightly larger than the movable range in which the barrel 13 is to be moved.
  • the photo sensor 18 is used for confirming the position of the photographing target.
  • the photo sensor 18 emits IR (infrared) light to the subject and detects whether the reflected light can be received by the light receiving sensor (ON state) or cannot be received (OFF state). To do.
  • IR infrared
  • This detection result of the photo sensor 18 can also be used for automatically adjusting the position of the lens barrel 13.
  • the detection result may be processed by software, and the magnitude of the current applied to the shape memory alloy 16 may be determined based on the processing result.
  • a part 36 of the lens barrel 13 extends to the photo sensor 18.
  • This extended portion 36 of the lens barrel 13 is a portion for shielding the IR from the photosensor 17 from light. Furthermore, based on whether the IR of the photosensor 17 is blocked or unblocked by the extension 36, it is determined whether the camera lens 19 is securely moving or the desired position of the camera lens. This is a part to confirm that the position is correctly determined. For example, in a normal state, when the lens barrel 13 is at a position away from the object to be photographed (a position moved in the direction of arrow a in the drawing), the photo sensor 17 is not shaded, and When it is in the approaching position (the position moved in the direction of arrow a in the figure), the photo sensor 17 is shielded from light. However, if a camera lens does not move due to foreign matter entering the movable part of the lens barrel 13 or some other trouble, the light blocking state of the photo sensor 18 becomes abnormal. Abnormalities can be detected.
  • the camera lens can be positioned with high accuracy by using an inexpensive shape memory alloy.
  • a camera module having such a function can be provided with low cost, low power, a simple structure, and a small space.
  • the lens barrel is photographed by a coil spring.
  • the lens barrel was moved in the direction away from the elephant, on the other hand, in the direction approaching the object to be photographed by the shape memory alloy.
  • the lens barrel may be moved in a direction away from the object to be imaged.
  • the housing is provided with a hole and the lens barrel is provided with a protruding portion.
  • the lens barrel may be provided with a hole and the housing may be provided with a protruding portion.
  • the housing and the lens barrel are engaged with each other so that the range of movement of the lens barrel is regulated by the housing.
  • the range of movement of the lens barrel can be regulated by the housing.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Lens Barrels (AREA)
  • Studio Devices (AREA)

Abstract

A positioning device for a camera lens. The device comprises a housing; a lens support member for supporting a camera lens, provided in the housing so as to be movable in a direction approaching a shooting object or in a direction moving away from the shooting object; a guide member for guiding the lens support member in its movement direction, provided along a movement direction of the lens support member; a member for always applying force to the lens support member either in a direction approaching a shooting object or in a direction moving away from the shooting object; and shape memory alloy for appropriately applying force to the lens support member in the opposite direction to the member for always applying force. A movement range in movement directions of the lens support member can be limited by the engagement of the lens support member and the housing. With the device, positioning with required accuracy of a camera lens can be provided with low cost, low power consumption, simple structure, and small space.

Description

明細書 形状記憶合金を用いたカメラレンズの位置決め装置及び  Description Positioning device for camera lens using shape memory alloy and
この位置決め装置を用いたカメラ 技術分野  Camera using this positioning device
本発明は、 オートフォーカス機構、 オートマクロ機構、 電動マクロ機構、 ズー ム機構等のカメラの可変焦点機構を実行するためのカメラレンズの位置決め装置、 更に言えば、 形状記憶合金を用いたカメラレンズの位置決め装置及ぴこの位置決 め装置を用いたカメラに関する。 背景技術  The present invention relates to a camera lens positioning device for executing a variable focus mechanism of a camera such as an autofocus mechanism, an auto macro mechanism, an electric macro mechanism, a zoom mechanism, and more specifically, a camera lens using a shape memory alloy. The present invention relates to a positioning device and a camera using the positioning device. Background art
よりよい写真を撮るには、 ピント位置は勿論、 被写界深度を考慮する必要があ る。 被写界深度を決める一因として、 解像度や許容最大錯乱円等がある。 一般に、 同じ大きさの撮像デバイスにおいて解像度が上がると、 許容できる最大錯乱遠景 は小さくなり、 この結果、 被写界深度の幅は狭くなる。 したがって、 特に、 解像 度を上げたとき等は、 被写界深度の中心を適切な位置に決定する必要がある。 こ の被写界深度の中心は、 ピント位置と同様に、 カメラレンズの位置によって決定 され得る。 故に、 例えば、 より接近した撮影対象、 若しくは、 より遠くに離れた 撮影対象を、 よりょく撮影するには、 カメラレンズの位置決めをできるだけ高精 度で行う必要がある。 特に近年、 解像度の高い携帯電話が所望されるようになつ たことから、 携帯電話のような小型装置に用いる小型カメラにおいても、 カメラ レンズの位置決めを、 より高精度に、 しかも、 低コスト、 低電力、 簡な構造、 且 つ小スペースで実行できる構成が所望されている。  To take better photos, it is necessary to consider not only the focus position but also the depth of field. The factors that determine the depth of field include the resolution and the maximum permissible circle of confusion. In general, as the resolution increases for imaging devices of the same size, the maximum permissible distant view decreases, resulting in a narrower depth of field. Therefore, especially when the resolution is increased, it is necessary to determine the center of the depth of field to an appropriate position. The center of this depth of field can be determined by the position of the camera lens, as well as the focus position. Therefore, for example, in order to more closely photograph an object to be photographed or an object to be photographed farther away, it is necessary to position the camera lens as accurately as possible. Particularly, in recent years, a mobile phone with a high resolution has been desired, so that even in a small camera used for a small device such as a mobile phone, the positioning of the camera lens can be performed with higher accuracy, lower cost, and lower cost. There is a need for power, a simple structure, and a configuration that can be implemented in a small space.
ところで、 携帯電話に用いる従来の小型カメラの中には、 カメラレンズを位置 決めするために、 「マクロ」 モードと呼ばれる機能を設けているものがある。 こ の 「マクロ」 モード機能は、 より接近した撮影対象を撮影するときに使用される。 し力 しながら、 「マクロ」 モードを実行するためには手動操作が必要である。 明 らかにこの操作は煩雑である。 一方、 手動操作を必要としないオートフォーカス 機能も実現されている。 し力 しながら、 この場合には、 レンズを移動させるァク チユエータとして、 例えば、 直流モータ (D CM) やステッピングモータ (S T M) のような装置が必要とされる。 D CMや S TMの中には、 その直径が 4 mm より大きなものもあり、 これらを設置するにはかなり大きなスペースを必要とす る。 故に、 これら D CMや S TMを用いた場合、 装置の小型化は困難となり、 ま た、 これらは携帯電話のような小型装置にとっては不向きである。 また、 D CM は、 レンズを動かすためにギアやセンサを必要とし、 一方、 S TMは、 レンズを 動かすためにリードスクリユーやギヤのような駆動装置や電気回路、 センサを必 要とすることから、 機械的駆動のために消費電力も大きくなり、 構造も複雑化し、 故障も多く、 コストも高いといった欠点がある。 By the way, some conventional small cameras used for mobile phones have a camera lens Some have provided a feature called "macro" mode to make the decision. This “macro” mode function is used when shooting a closer object. However, manual operation is required to execute the “macro” mode. Obviously, this operation is complicated. On the other hand, an autofocus function that does not require manual operation has also been realized. However, in this case, a device such as a DC motor (DCM) or a stepping motor (STM) is required as an actuator for moving the lens. Some DCMs and STMs are larger than 4 mm in diameter and require a significant amount of space to install them. Therefore, when these DCM and STM are used, it is difficult to reduce the size of the device, and they are not suitable for a small device such as a mobile phone. Also, DCM requires gears and sensors to move the lens, while STM requires driving devices, electrical circuits and sensors such as lead screws and gears to move the lens. Therefore, it has disadvantages such as high power consumption due to mechanical drive, complicated structure, many failures, and high cost.
また、 従来は、 カメラレンズ等を動かすために、 形状記憶合金が利用されるこ ともあった。 例えば、 特開 2 0 0 0— 1 3 7 1 5 5号には、 2枚の板状の形状記 憶合金を温度変化に応じて変形させることにより、 これらの板状形状記憶合金の 間に配したカメラレンズの一部と形状記憶合金との接触を通じて、 カメラレンズ の位置を移動させる装置が開示されている。 しかしながら、 この装置は、 温度変 化に応じてカメ'ラレンズの位置を移動さ,せるだけの装置であって、 カメラレンズ の位置を自由に位置決めする技術に関するものではない。 また、 特開平 6— 2 3 0 4 5 7号には、 2本の細線状の形状記憶合金を力メラの絞り部材の左右各側に 設け、 これらの形状記憶合金の働きを利用して、 温度変化に応じて絞り部材を移 動させる絞り調節装置が開示されている。 し力 しながら、 この装置は、 温度変化 に応じて絞り部材を移動させる装置であって、 上と同様、 カメラレンズの位置を 自由に位置決めするための技術に関するものではない。 発明の開示 In the past, shape memory alloys were sometimes used to move camera lenses and the like. For example, Japanese Patent Application Laid-Open No. 2000-137715 discloses that two plate-shaped shape memory alloys are deformed in response to a change in temperature so that a space between these plate-shaped shape memory alloys is formed. An apparatus for moving the position of a camera lens through contact between a part of the arranged camera lens and a shape memory alloy is disclosed. However, this device is only a device for moving the position of the camera lens according to a temperature change, and does not relate to a technique for freely positioning the position of the camera lens. In Japanese Patent Application Laid-Open No. Hei 6-230457, two thin line-shaped shape memory alloys are provided on each of the left and right sides of the diaphragm member of the force ram, and by utilizing the function of these shape memory alloys, An aperture adjusting device that moves an aperture member according to a temperature change is disclosed. This device is a device that moves the diaphragm member according to the temperature change. It does not relate to a technique for positioning freely. Disclosure of the invention
本発明は、 形状記憶合金を用いてカメラレンズを移動させ、 必要な精度で位置 決めできる位置決め装置と、 この位置決め装置を用いたカメラを、 低コスト、 低 電力、 簡易構造、 且つ小スペースで提供するものである。  The present invention provides a positioning device capable of moving a camera lens using a shape memory alloy to determine a position with required accuracy, and a camera using the positioning device with low cost, low power, a simple structure, and a small space. Is what you do.
本発明によれば、 ハウジングと、 撮影対象に接近する方向若しくは撮影対象か ら遠ざかる方向に移動可能な状態で前記ノヽウジングに設けられた、 カメラレンズ を支持するレンズ支持部材と、 このレンズ支持部材の前記移動方向に沿って設け られた、 前記レンズ支持部材を前記移動方向に案内する案内部材と、 前記撮影対 象に接近する方向若しくは前記撮影対象から遠ざかる方向のいずれかの方向に前 記レンズ支持部材に常時力を加える部材と、 前記常時力を加える部材とは逆方向 に前記レンズ支持部材に適宜に力を加える形状記憶合金と、 を備え、 前記レン 支持部材と前記ハウジングを係合させることにより、 前記レンズ支持部材の前記 移動方向における移動範囲を規制するカメラレンズの位置決め装置が提供される。 上記装置において、 前記形状記憶合金は電流が与えられたときに縮むようなも のでもよい。 また、 上記装置において、 前記常時力を加える部材はコイルパネで あってもよい。  According to the present invention, a housing, a lens support member that supports a camera lens, and is provided on the nozzle so as to be movable in a direction approaching or away from the imaging target, and a lens support member A guide member provided along the movement direction for guiding the lens support member in the movement direction; and the lens in a direction of approaching the object to be photographed or away from the object to be photographed. A member that constantly applies a force to the support member, and a shape memory alloy that appropriately applies a force to the lens support member in a direction opposite to the member that constantly applies the force, wherein the lens support member and the housing are engaged. Thereby, a camera lens positioning device that regulates a movement range of the lens support member in the movement direction is provided. In the above device, the shape memory alloy may be such that it shrinks when an electric current is applied. In the above device, the member that constantly applies the force may be a coil panel.
また、 上記装置において、 前記レンズ支持部材に突出部若しくは穴を設け、 こ れに対応して、 前記ノヽゥジングに穴若しくは突出部を設け、 前記突出部を前記穴 に揷入し、 前記移動方向に沿つて相対して配置された穴の壁と前記突出部とを衝 突させるようにして前記レンズ支持部材の移動範囲を規制するようにしてもよい。 更に、 本発明によれば、 上の位置決め装置を備えたカメラが提供される。 図面の簡単な説明 Further, in the above apparatus, a projection or a hole is provided in the lens support member, and a hole or a projection is provided in the nosing corresponding thereto, and the projection is inserted into the hole, and the moving direction is changed. The movement range of the lens support member may be restricted by causing the wall of the hole disposed opposite to the projection to collide with the projection. Further, according to the present invention, there is provided a camera provided with the above positioning device. Brief Description of Drawings
図 1は、 本発明によるカメラモジュールの内部をその内側から見た概略斜視図 である。  FIG. 1 is a schematic perspective view of the inside of a camera module according to the present invention as viewed from the inside.
図 2は、 図 1のカメラモジュールのハウジングの部分斜視図である。 発明を実施するための最良の形態  FIG. 2 is a partial perspective view of a housing of the camera module of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
図 1、 図 2を参照して、 本発明の一実施形態によるカメラモジュールを説明す る。 図 1は、 カメラモジュールの内部をその内側から見た概略斜視図、 図 2は、 このカメラモジュールのハウジングの部分 #1·視図である。 尚、 これらの図に示し たカメラモジュール 1は、 カメラの一部を構成するだけで、 それ単独で使用され るものでない。 また、 このカメラモジユー Λ^ Ιをカメラに aみ込んだときの状態 は明らかであるため、 特に図示しない。  A camera module according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic perspective view of the inside of the camera module as viewed from the inside, and FIG. 2 is a view of a portion # 1 of the housing of the camera module. Note that the camera module 1 shown in these figures only constitutes a part of the camera and is not used alone. Moreover, since the state when this camera module Λ ^ み is inserted into the camera is clear, it is not particularly shown.
このカメラモジユー/レ 1は、 主に、 ハウジング 1 1と、 このハウジング 1 1に 移動可能に取り付けられた可動式のレンズバレル 1 3、 このレンズバレル 1 3の 移動方向を規制するガイドシャフト 1 5、 レンズバレル 1 3に一の所定方向に常 時力を加えるコイルバネ 1 7、 この一の所定方向とは逆方向に適宜に力を加えて レンズバレル 1 3を駆動させる形状記憶合金 1 6、 及び撮影対象の位置を確認す るためのフォトセンサ 1 8から成る。  The camera module 1 mainly includes a housing 11, a movable lens barrel 13 movably attached to the housing 11, a guide shaft 15 for regulating a moving direction of the lens barrel 13, A coil spring 17 that applies a normal force to the lens barrel 13 in one predetermined direction, a shape memory alloy 16 that drives the lens barrel 13 by appropriately applying a force in a direction opposite to the one predetermined direction, and photographing It consists of a photo sensor 18 for confirming the position of the object.
レンズバレル 1 3は全体として略筒状に形成されている。 カメラレンズ 1 9は、 このレンズバレル 1 3の中心穴付近に固定して設けられる。 レンズバレル 1 3の 特に前方部は、 ハウジング 1 1の前板 2 1に設けた貫通穴 2 2に揷入される。 こ の結果、 カメラレンズ 1 9とレンズバレル 1 3の先端側環状部分 (図示されてい ない) は、 ハウジング 1 1の前面 (ハウジング 1 1の前板 2 1の前側) で露出さ れる。 レンズバレル 1 3は、 この貫通穴 2 2に揷入されたまま、 ハウジング 1 1 に引っ込む方向、 若しくは、 ハウジング 1 1から突出する方向に移動可能とされ る。 上述したように、 カメラレンズ 1 9はレンズバレル 1 3に固定されている力 ら、 このレンズバレル 1 3の移動に応じてカメラレンズ 1 9も移動する。 この移 動によってカメラレンズ 1 9の位置は調整され、 カメラのピント調節やズームが なされることになる。 The lens barrel 13 is formed in a substantially cylindrical shape as a whole. The camera lens 19 is fixedly provided near the center hole of the lens barrel 13. In particular, the front part of the lens barrel 13 is inserted into a through hole 22 provided in the front plate 21 of the housing 11. As a result, the front annular portion (not shown) of the camera lens 19 and the lens barrel 13 is exposed on the front surface of the housing 11 (the front side of the front plate 21 of the housing 11). The lens barrel 13 can be moved in the direction of retracting into the housing 11 or protruding from the housing 11 while being inserted into the through hole 22. The As described above, the camera lens 19 moves in accordance with the movement of the lens barrel 13 due to the force fixed to the lens barrel 13. By this movement, the position of the camera lens 19 is adjusted, and the focus of the camera is adjusted and the zoom is performed.
レンズバレル 1 3の背面側の左右各側面には、 左右各側にそれぞれ突出する略 半円突出部 2 4 A、 2 4 Bが設けられており、 更に、 これら略半円突出部 2 4の 中心付近には貫通穴 2 6が設けられている。 これらの貫通穴 2 6には、 それぞれ、 ガイドシャフト 1 5が貫通される。 これにより、 レンズバレル 1 3をこれらのガ ィドシャフト 1 5に沿って案内することができる。 例えば、 レンズバレル 1 3が、 ハウジング 1 1の前面に対して垂直方向に移動し得るように、 ハウジング 1 1の 前板 2 1裏側からハウジング 1 1の内部に向かって垂直方向に延出するようにガ イドシャフト 1 5を設けてもよレ、。 尚、 図 1では、 ガイドシャフト 1 5と略半円 突出部 2 4との関係が明らかとなるよう、 特に左側の略半円突出部 2 4 Aの一部 を破断状態で示している。  On each of the left and right side surfaces on the rear side of the lens barrel 13, there are provided substantially semicircular protrusions 24 A and 24 B protruding from the left and right sides, respectively. A through hole 26 is provided near the center. The guide shafts 15 pass through these through holes 26 respectively. Thereby, the lens barrel 13 can be guided along these guide shafts 15. For example, the lens barrel 13 extends vertically from the back of the front plate 21 of the housing 11 toward the inside of the housing 11 so that the lens barrel 13 can move vertically with respect to the front of the housing 11. A guide shaft 15 may be provided on the machine. In FIG. 1, in particular, a part of the left substantially semicircular projection 24A is shown in a broken state so that the relationship between the guide shaft 15 and the substantially semicircular projection 24 is clear.
また、 レンズバレル 1 3の略中間付近の上部側面には、 上方に突出する矩形断 面を持つ垂直突出部 2 9が設けられている。 この垂直突出部 2 9の上側の一部は、 力メラモジュールが組立てられたときに、 ハウジング 1 1の上板 2 3に設けた矩 形の穴 2 8に揷入される。 特に、 レンズバレル 1 3の移動方向における垂直突出 部 2 9の長さは、 レンズバレル 1 3が穴 2 8の内部で移動可能となるように、 上 記方向におけるハウジング 1 1の穴 2 8の長さよりも若干小さ目に形成されてい る。 ハウジング 1 1の穴 2 8の内部には、 レンズバレル 1 3の移動方向に沿って、 壁 3 O Aと壁 3 0 Bが相対する位置に形成されている。 これらの壁 3 0 A、 3 0  Further, a vertical protruding portion 29 having a rectangular cross section protruding upward is provided on an upper side surface near the middle of the lens barrel 13. The upper part of the vertical protrusion 29 is inserted into a rectangular hole 28 provided in the upper plate 23 of the housing 11 when the power module is assembled. In particular, the length of the vertical protrusion 29 in the direction of movement of the lens barrel 13 is such that the length of the hole 28 in the housing 11 in the above direction is such that the lens barrel 13 can move inside the hole 28. It is slightly smaller than the length. A wall 3OA and a wall 30B are formed inside the hole 28 of the housing 11 along the moving direction of the lens barrel 13 so as to face each other. These walls 30 A, 30
Bを設けることにより、 ハウジング 1 1の穴 2 8にその一部が揷入されたレンズ バレル 1 3の移動範囲を規制することができる。 レンズバレル 1 3は、 その移動 方向において、 これらの壁 3 0 A、 3 O Bと衝突することにより、 その移動範囲 - が制限される。 このときレンズバレル 1 3が移動可能な長さ (距離) は、 明らか なように、 (壁 3 O Aと壁 3 O Bの間の長さ) 一 (移動方向における、 垂直突出 部 2 9の特に先端付近の厚み) である。 これは、 例えば、 約 0 . 0 5 mm程度と 考えてよい。 尚、 壁 3 0 A、 3 O Bは、 金型等でハウジング 1 1の一部として一 体成形され得る点にも注意していただきたい。 このように、 壁 3 0 A、 3 O Bを ハウジング 1 1の一部として設けることにより、 レンズバレル 1 3の移動範囲を 規制する部材をわざわざ設ける必要がなく、 また、 移動範囲を調整する調整機構 を設ける必要もない By providing B, the movement range of the lens barrel 13 partially inserted into the hole 28 of the housing 11 can be regulated. The lens barrel 13 collides with these walls 30 A, 3 OB in the direction of its movement, so that its range of movement- Is limited. At this time, the length (distance) in which the lens barrel 13 can move is apparently (the length between the wall 3 OA and the wall 3 OB) one (particularly the tip of the vertical protrusion 29 in the moving direction). (Thickness in the vicinity). This may be considered to be, for example, about 0.05 mm. It should be noted that the walls 30A and 3OB can be integrally formed as a part of the housing 11 with a mold or the like. Thus, by providing the walls 30A and 3OB as a part of the housing 11, there is no need to separately provide a member for regulating the moving range of the lens barrel 13, and an adjusting mechanism for adjusting the moving range. It is not necessary to provide
コイルバネ 1 7は、 レンズバレル 1 3にある一の所定方向に力を加えるための 部材である。 コイルバネ 1 7は、 ガイドシャフト 1 5の周囲を取り巻くように設 けられ、 その一端はハウジング 1 1の前板内壁 2 7と衝突し、 他端はレンズバレ ル 1 3の略半円突出部 2 4の前面 2 5と衝突する。 このコイルバネ 1 7の働きに より、 レンズバレル 1 3は、 撮影対象から遠ざかる方向 (図示矢印ァ方向) 、 換 言すれば、 壁 3 O Aと衝突する方向に常時押し付けられることになる。 例えば、 S X G Aカメラの例で言えば、 このときのカメラのフォーカスポイントは約 l m であ 、 被写界深度は約 7 0 c m〜無限大である。  The coil spring 17 is a member for applying a force in one predetermined direction on the lens barrel 13. The coil spring 17 is provided so as to surround the guide shaft 15. One end of the coil spring 17 collides with the front plate inner wall 27 of the housing 11, and the other end thereof has a substantially semicircular projection 2 4 of the lens barrel 13. Collides with the front of the 2 5. By the function of the coil spring 17, the lens barrel 13 is constantly pressed in the direction away from the object to be photographed (in the direction of arrow a in the drawing), in other words, in the direction in which it collides with the wall 3OA. For example, in the case of the SXGA camera, the focus point of the camera at this time is about 1 m, and the depth of field is about 70 cm to infinity.
形状記憶合金 1 6は、 レンズバレル 1 3を移動させるァクチユエータとして機 能する。 形状記憶合金 1 6は、 例えば、 糸状に形成されていてもよい。 その直径 は約 1 mm力若しくはそれより小さい。 形状記憶合金 1 6は、 ハウジング 1 1の 前板 2 1に設けた穴 3 2を通じて、 ハウジング 1 1の外部から内部に取り込まれ、 その先端は、 レンズバレル 1 3の略半円突出部 2 4の上部から垂直に伸びる棒 3 4に固定される。 この形状記憶合金 1 6は、 電流が与えられたときに縮むように、 また、 電流の付与が中止されたときは徐々に元の長さへ戻るように形成されてレヽ る。 尚、 形状記憶合金 1 6に電流が与えられるのは、 撮影時のみであり、 故に、 この形状記憶合金によつて無駄な電力が消費されることはなレヽ。 形状記憶合金 1 6が縮んでいるとき、 通常位置にあるレンズバレル 1 3は、 形状記憶合金 1 6と 棒 3 4との接触を通じて、 コイルバネ 1 7の力に杭して撮影対象に接近する方向 (図示矢印ィ方向) 、 換言すれば、 レンズバレル 1 3の垂直突出部 2 9の一部が 壁 3 0 Bと衝突する方向 (壁 3 0 Bに接近する方向) に動かされる。 逆に、 形状 記憶合金 1 6が元の長さに戻るとき、 レンズバレル 1 3は、 コイルバネ 1 7の働 きによって助長されながら、 撮影対象から遠ざかる方向 (図示矢印ァ方向) 、 換 言すれば、 レンズバレル 1 3の垂直突出部の一部が壁 3 O Aと衝突する方向 (壁 3 O Aに接近する方向) に動かされる。 尚、 レンズバレル 1 3が壁 3 0 Bに完全 に衝突したとき、 上の S X G Aカメラの例で言えば、 フォーカスポイントは約 4 0 c mであり、 被写界深度は約 2 5 c m〜 1 mである。 The shape memory alloy 16 functions as an actuator that moves the lens barrel 13. The shape memory alloy 16 may be formed in a thread shape, for example. Its diameter is about 1 mm force or less. The shape memory alloy 16 is taken in from the outside of the housing 11 through a hole 32 provided in the front plate 21 of the housing 11, and the tip of the shape memory alloy 16 is a substantially semicircular projection 2 4 of the lens barrel 13. It is fixed to a rod 3 4 that extends vertically from the top of. The shape memory alloy 16 is formed so as to shrink when a current is applied, and to gradually return to the original length when the application of the current is stopped. It should be noted that the current is applied to the shape memory alloy 16 only at the time of photographing, and therefore no wasteful power is consumed by this shape memory alloy. Shape memory alloy 1 When the lens barrel 6 is retracted, the lens barrel 13 at the normal position is pushed by the force of the coil spring 17 through the contact between the shape memory alloy 16 and the rod 34 to approach the object to be photographed (arrow in the figure). Direction), in other words, a part of the vertical protrusion 29 of the lens barrel 13 is moved in a direction in which it collides with the wall 30B (a direction approaching the wall 30B). Conversely, when the shape memory alloy 16 returns to its original length, the lens barrel 13 moves away from the object to be photographed (in the direction indicated by the arrow a) while being promoted by the action of the coil spring 17, in other words, However, a part of the vertical projection of the lens barrel 13 is moved in a direction in which the lens barrel 13 collides with the wall 3 OA (a direction approaching the wall 3 OA). When the lens barrel 13 completely collides with the wall 30B, in the above SXGA camera example, the focus point is about 40 cm, and the depth of field is about 25 cm to 1 m. It is.
電流が与えられたときに形状記憶合金 1 6が縮む大きさは、 電流量によってあ る程度は調整可能である。 しかしながら、 電流量を調整することは困難であり、 この場合には、 製造コストも増える。 また、 同じ電流量を与えても、 形状記憶合 金毎に縮む大きさにはバラツキがあり、 一方、 同じ形状記憶合金を用いても、 室 温や湿度等によつて縮む大きさは異なる。 このように、 形状記憶合金は好ましく ない性質を有する力 本願発明では、 レンズバレル 1 3の移動範囲を壁 3 0 Aと 壁 3 0 Bによって規制していることから、 安価な形状記憶合金を用いて、 カメラ レンズの位置決めを、 必要な精度で、 また、 低コスト、 簡易な構造で行うことが できる。 尚、 形状記憶合金は上述したように好ましくない性質を有することから、 使用する形状記憶合金としては、 レンズバレル 1 3の移動範囲をカバーするのに 十分な駆動量を有するもの、 好ましくは、 レンズバレル 1 3が移動すべき移動範 囲よりも多少大き目の駆動量を有するものが好ましい。  The extent to which the shape memory alloy 16 shrinks when a current is applied can be adjusted to some extent by the amount of current. However, it is difficult to adjust the amount of current, and in this case, the manufacturing cost also increases. Also, even if the same amount of current is applied, the size of shrinkage varies for each shape memory alloy. On the other hand, even when the same shape memory alloy is used, the size of shrinkage varies depending on room temperature and humidity. As described above, the shape memory alloy has a force having an unfavorable property. In the present invention, since the movement range of the lens barrel 13 is regulated by the wall 30A and the wall 30B, an inexpensive shape memory alloy is used. Thus, the positioning of the camera lens can be performed with the required accuracy, at a low cost, and with a simple structure. Since the shape memory alloy has unfavorable properties as described above, the shape memory alloy to be used is one having a sufficient driving amount to cover the moving range of the lens barrel 13, preferably a lens It is preferable that the barrel 13 has a drive amount slightly larger than the movable range in which the barrel 13 is to be moved.
フォトセンサ 1 8は、 撮影対象の位置を確認するために用いる。 フォトセンサ 1 8は、 撮影対象へ I R (赤外線) を投光し、 その反射光を受光センサで受信で きる状態 (O N状態) 、 若しくは、 受信できない状態 (O F F状態) かを検知 する。 この結果、 例えば、 O N状態にあれば、 撮影対象は比較的近い位置にある と判断し、 一方、 O F F状態にあれば、 撮影対象は比較的遠い位置にあると判断 する。 フォトセンサ 1 8のこの検知結果は、 レンズバレル 1 3の位置を自動調整 するために用いることもできる。 例えば、 検出結果をソフトウェアによって処理 し、 この処理結果に基づいて、 形状記憶合金 1 6に与える電流の大きさを決定す ることもできる。 The photo sensor 18 is used for confirming the position of the photographing target. The photo sensor 18 emits IR (infrared) light to the subject and detects whether the reflected light can be received by the light receiving sensor (ON state) or cannot be received (OFF state). To do. As a result, for example, if it is in the ON state, it is determined that the imaging target is at a relatively close position, whereas if it is in the OFF state, it is determined that the imaging target is at a relatively far position. This detection result of the photo sensor 18 can also be used for automatically adjusting the position of the lens barrel 13. For example, the detection result may be processed by software, and the magnitude of the current applied to the shape memory alloy 16 may be determined based on the processing result.
このフォトセンサ 1 8に対しては、 レンズバレル 1 3の一部 3 6が伸ぴている。 レンズバレル 1 3のこの延長部分 3 6は、 フォトセンサ 1 7からの I Rを遮光す るための部分である。 更に言えば、 フォトセンサ 1 7力 らの I Rが延長部分 3 6 によって遮光されているか遮光されていないかに基づいて、 カメラレンズ 1 9が 確実に動いているかどう力 若しくは、 カメラレンズが所望の位置に確実に位置 決めされているかどうかを確認するための部分である。 例えば、 正常な状態のと き、 レンズバレル 1 3が撮影対象から遠ざかった位置 (図示矢印ァ方向に移動し た位置) にあるときは、 フォトセンサ 1 7は遮光されず、 一方、 撮影対象に接近 した位置 (図示矢印ィ方向に移動した位置) にあるときは、 フォトセンサ 1 7は 遮光される。 しかしながら、 レンズバレル 1 3の可動部に異物が入ったり何らか のトラブルでカメラレンズが動かなかった場合、 フォトセンサ 1 8の遮光状態は 異常となるため、 この遮光状態を感知することにより、 装置の異常を検知するこ とができる。  A part 36 of the lens barrel 13 extends to the photo sensor 18. This extended portion 36 of the lens barrel 13 is a portion for shielding the IR from the photosensor 17 from light. Furthermore, based on whether the IR of the photosensor 17 is blocked or unblocked by the extension 36, it is determined whether the camera lens 19 is securely moving or the desired position of the camera lens. This is a part to confirm that the position is correctly determined. For example, in a normal state, when the lens barrel 13 is at a position away from the object to be photographed (a position moved in the direction of arrow a in the drawing), the photo sensor 17 is not shaded, and When it is in the approaching position (the position moved in the direction of arrow a in the figure), the photo sensor 17 is shielded from light. However, if a camera lens does not move due to foreign matter entering the movable part of the lens barrel 13 or some other trouble, the light blocking state of the photo sensor 18 becomes abnormal. Abnormalities can be detected.
明らかなように、 本発明の構成によれば、 安価な形状記憶合金を用いて、 カメ ラレンズの位置決めを高い精度で行うことができる。 また、 このような機能を備 えたカメラモジュールを、 低コスト、 低電力、 簡易構造、 且つ小スペースで提供 することができる。  As is apparent, according to the configuration of the present invention, the camera lens can be positioned with high accuracy by using an inexpensive shape memory alloy. In addition, a camera module having such a function can be provided with low cost, low power, a simple structure, and a small space.
尚、 上のコイルバネに代えて、 板バネその他の弾性部材やその他の材料を用い てもよい。 また、 上の実施形態では、 コイノレバネによってレンズバレルを撮影対 象から遠ざかる方向に、 一方、 形状記憶合金によってレンズバレルを撮影対象に 接近する方向に移動させるものとしたが、 逆に、 コイルバネによってレンズバレ ルを撮影対象に接近する方向に、 一方、 形状記憶合金によってレンズバレルを撮 影対象から遠ざかる方向に移動させるものとしてもよい。 It should be noted that a leaf spring or another elastic member or other material may be used in place of the above coil spring. Further, in the above embodiment, the lens barrel is photographed by a coil spring. The lens barrel was moved in the direction away from the elephant, on the other hand, in the direction approaching the object to be photographed by the shape memory alloy. The lens barrel may be moved in a direction away from the object to be imaged.
また、 上の実施形態では、 ハウジングに穴を設け、 レンズバレルに突出部を設 けるとしたが、 逆に、 レンズバレルに穴を設け、 ハウジングに突出部を設けるよ うにしてもよい。 更に、 ノヽウジングとレンズバレルは、 レンズバレルの移動範囲 がハゥジングによつて規制されるように互いに係合していれば足り、 必ずしも穴 や突出部によって係合している必要はない。 ここ.では、 レンズバレルの移動範囲 をハウジングによって規制できれば十分である。  Further, in the above embodiment, the housing is provided with a hole and the lens barrel is provided with a protruding portion. However, conversely, the lens barrel may be provided with a hole and the housing may be provided with a protruding portion. Further, it is sufficient that the housing and the lens barrel are engaged with each other so that the range of movement of the lens barrel is regulated by the housing. Here, it is sufficient if the range of movement of the lens barrel can be regulated by the housing.

Claims

請求の範囲 The scope of the claims
1 . カメラレンズの位置決め装置において、 1. In the camera lens positioning device,
ノ、ウジングと、  No, aging,
撮影対象に接近する方向若しくは撮影対象から遠ざかる方向に移動可能な状態 で前記ハゥジングに設けられた、 カメラレンズを支持するレンズ支持部材と、 このレンズ支持部材の前記移動方向に沿つて設けられた、 前記レンズ支持部材 を前記移動方向に案内する案内部材と、  A lens support member that supports the camera lens and is provided along the moving direction of the lens support member, the lens support member being provided on the housing so as to be movable in a direction approaching or moving away from the imaging target; A guide member for guiding the lens support member in the movement direction;
前記撮影対象に接近する方向若しくは前記撮影対象から遠ざかる方向のレヽずれ かの方向に前記レンズ支持部材に常時力を加える部材と、  A member that constantly applies a force to the lens support member in a direction in which the lens support member approaches the imaging target or moves away from the imaging target;
前記常時力を加える部材とは逆方向に前記レンズ支持部材に適宜に力を加える 形状記憶合金と、 を備え、  A shape memory alloy that appropriately applies a force to the lens support member in the opposite direction to the member that constantly applies the force.
前記レンズ支持部材と前記ノヽゥジングを係合させることにより、 前記レンズ支 持部材の前記移動方向における移動範囲を規制することを特徴とする装置。  An apparatus, wherein a movement range of the lens support member in the moving direction is regulated by engaging the lens supporting member with the nodging.
2 . 請求項 1記載の装置において、 前記形状記憶合金は電流が与えられたときに 縮む装置。 2. The device according to claim 1, wherein the shape memory alloy shrinks when an electric current is applied.
3 . 請求項 1又は 2に記載の装置において、 前記常時力を加える部材はコイルバ ネである装置。 3. The device according to claim 1, wherein the member that constantly applies a force is a coil spring.
4 . 請求項 1乃至 3のいずれかに記載の装置において、 前記レンズ支持部材に突 出部若しくは穴を設け、 これに対応して、 前記ハウジングに穴若しくは突出部を 設け、 前記突出部を前記穴に挿入し、 前記移動方向に沿って相対して配置された 穴の壁と前記突出部とを衝突させるようにして前記レンズ支持部材の移動範囲を 規制する装置。 4. The device according to any one of claims 1 to 3, wherein a protrusion or a hole is provided in the lens support member, and a hole or a protrusion is provided in the housing correspondingly. The lens support member is inserted into the hole, and the moving range of the lens support member is adjusted by colliding the wall of the hole, which is disposed facing the moving direction, with the protrusion. Device to regulate.
5 . 請求項 1乃至 4のいずれかの位置決め装置を備えた力メラ。 5. A force lens provided with the positioning device according to any one of claims 1 to 4.
PCT/JP2003/008220 2003-06-27 2003-06-27 Camera lens-positioning device using shape memory alloy and camera using the device WO2005001539A1 (en)

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PCT/JP2003/008220 WO2005001539A1 (en) 2003-06-27 2003-06-27 Camera lens-positioning device using shape memory alloy and camera using the device
AU2003244145A AU2003244145A1 (en) 2003-06-27 2003-06-27 Camera lens-positioning device using shape memory alloy and camera using the device
JP2005511132A JPWO2005001540A1 (en) 2003-06-27 2004-06-28 Camera lens positioning device using shape memory alloy and camera using this positioning device
KR1020057025125A KR100821697B1 (en) 2003-06-27 2004-06-28 Camera lens-positioning device using shape memory alloy and camera using the same
EP04746937A EP1640757A4 (en) 2003-06-27 2004-06-28 Camera lens-positioning device using shape memory alloy and camera using the same
PCT/JP2004/009468 WO2005001540A1 (en) 2003-06-27 2004-06-28 Camera lens-positioning device using shape memory alloy and camera using the same
CNB2004800181425A CN100359355C (en) 2003-06-27 2004-06-28 Camera lens-positioning device using shape memory alloy and camera using the same
US11/316,251 US7177539B2 (en) 2003-06-27 2005-12-21 Camera lens positioning device using shape memory alloy and camera using the positioning device
JP2009183042A JP2009258760A (en) 2003-06-27 2009-08-06 Camera lens-positioning device using shape memory alloy and camera using the same

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